1. 直接写出得数。
0.7 + 3.4 =
8.1 ÷ 0.9 =
3.12 - 0.9 =
10 - 9.2 + 1.6 =
3.2 - 0.32 =
1.3 × 0.5 =
7.2 ÷ 0.12 =
33.8 - 4 ÷ 0.2 =
1.8 ÷ 100 =
6.9 ÷ 0.1 =
1.26 ÷ 0.6 =
1.5 × 3 × 0.1 =
7.5 × 2 =
0.2 + 0.78 =
0.6 × 0.06 =
1 ÷ 0.05 - 5.5 =
1.4 ÷ 7 =
0.4 × 0.5 =
60 ÷ 0.5 =
7.7 ÷ 0.7 + 2 =
0.27 ÷ 9 =
6 ÷ 0.25 =
0.1 ÷ 0.001 =
5 ÷ 100 × 1000 =
4.2 ÷ 0.6 =
6.9 ÷ 0.3 =
1 ÷ 0.8 =
4.9 × 2 - 1.3 =
0.98 - 0.89 =
1.9 × 0.4 =
400 × 0.005 =
0.15 ÷ 0.3 + 0.6 =
0.7 + 3.4 =
4.1
8.1 ÷ 0.9 =
9
3.12 - 0.9 =
2.22
10 - 9.2 + 1.6 =
2.4
3.2 - 0.32 =
2.88
1.3 × 0.5 =
0.65
7.2 ÷ 0.12 =
60
33.8 - 4 ÷ 0.2 =
13.8
1.8 ÷ 100 =
0.018
6.9 ÷ 0.1 =
69
1.26 ÷ 0.6 =
2.1
1.5 × 3 × 0.1 =
0.45
7.5 × 2 =
15
0.2 + 0.78 =
0.98
0.6 × 0.06 =
0.036
1 ÷ 0.05 - 5.5 =
14.5
1.4 ÷ 7 =
0.2
0.4 × 0.5 =
0.2
60 ÷ 0.5 =
120
7.7 ÷ 0.7 + 2 =
13
0.27 ÷ 9 =
0.03
6 ÷ 0.25 =
24
0.1 ÷ 0.001 =
100
5 ÷ 100 × 1000 =
50
4.2 ÷ 0.6 =
7
6.9 ÷ 0.3 =
23
1 ÷ 0.8 =
1.25
4.9 × 2 - 1.3 =
8.5
0.98 - 0.89 =
0.09
1.9 × 0.4 =
0.76
400 × 0.005 =
2
0.15 ÷ 0.3 + 0.6 =
1.1
答案
4.1 9 2.22 2.4 2.88 0.65 60 13.8 0.018 69 2.1 0.45 15 0.98 0.036 14.5 0.2 0.2 120 13 0.03 24 100 50 7 23 1.25 8.5 0.09 0.76 2 1.1
2. 用竖式计算。
1.2 × 4.6 =
0.27 × 3.3 =
3.06 ÷ 12 =
25.6 ÷ 0.32 =
0.16 ÷ 1.25 =
0.054 × 0.15 =
竖式略
1.2 × 4.6 =
5.52
0.27 × 3.3 =
0.891
3.06 ÷ 12 =
0.255
25.6 ÷ 0.32 =
80
0.16 ÷ 1.25 =
0.128
0.054 × 0.15 =
0.0081
竖式略
答案
5.52 0.891 0.255 80 0.128 0.0081 竖式略
解析
```
1.2
×4.6
----
72
48
----
5.52
0.27
×3.3
----
81
81
----
0.891
0.255
12)3.060
24
---
66
60
---
60
60
---
0
80
0.32)25.60
256
---
0
0.128
1.25)0.1600
125
---
350
250
---
1000
1000
---
0
0.054
×0.15
----
270
54
----
0.0081
```
1.2
×4.6
----
72
48
----
5.52
0.27
×3.3
----
81
81
----
0.891
0.255
12)3.060
24
---
66
60
---
60
60
---
0
80
0.32)25.60
256
---
0
0.128
1.25)0.1600
125
---
350
250
---
1000
1000
---
0
0.054
×0.15
----
270
54
----
0.0081
```
3. (1)填一填。
0.6 × 10 = 60 ×(
73 × 0.026 = 0.73 ×(
0.045 ÷ 1.5 = (
0.08 × 3.2 = 80 ×(
37.1 ÷ 0.01 = (
1.08 ÷ 0.2 = 1.08 ×(
(2)给 7.38 ÷ 4 + 5.05 × 0.6 添上括号,使它符合下面的运算顺序。
① 除→加→乘 算式:(
② 加→除→乘 算式:(
③ 加→乘→除 算式:(
0.6 × 10 = 60 ×(
0.1
)73 × 0.026 = 0.73 ×(
2.6
)0.045 ÷ 1.5 = (
0.45
)÷ 150.08 × 3.2 = 80 ×(
0.0032
)37.1 ÷ 0.01 = (
37.1
)× 1001.08 ÷ 0.2 = 1.08 ×(
5
)(2)给 7.38 ÷ 4 + 5.05 × 0.6 添上括号,使它符合下面的运算顺序。
① 除→加→乘 算式:(
(7.38÷4+5.05)×0.6
)② 加→除→乘 算式:(
7.38÷(4+5.05)×0.6
)③ 加→乘→除 算式:(
7.38÷[(4+5.05)×0.6]
)答案
(1)0.1 2.6 0.45 0.0032 37.1 5 (2)①(7.38÷4+5.05)×0.6 ②7.38÷(4+5.05)×0.6 ③7.38÷[(4+5.05)×0.6]
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